Title:
PROCESS FOR PREPARATION OF ERYTHROMYCIN COMPOUNDS
Document Type and Number:
WIPO Patent Application WO/2002/102818
Kind Code:
A1
Abstract:
A process for the preparation of erythromycin compounds by alkylating 2’−O−acetyl−4”−O−formyl−11−oxo−8,9−anhydro− erythromycin A 6,9−hemiketal compound (1), characterized by reacting compound (1) with an alkylating agent in a mixed solvent consisting of 0.18 to 1.05 times as much water as compound (1) by equivalent and an organic solvent to thereby obtain a 2’ −O−acetyl−4”−O−formyl−11−oxo−12−alkoxy−8,9−anhydroerythro− mycin A 6,9−hemiketal compound (3).
Inventors:
MIYATA HIROYUKI (JP)
TAKAMA AKIRA (JP)
YAMAMOTO YASUHITO (JP)
ATAKA KIKUO (JP)
TAKAMA AKIRA (JP)
YAMAMOTO YASUHITO (JP)
ATAKA KIKUO (JP)
Application Number:
PCT/JP2002/005825
Publication Date:
December 27, 2002
Filing Date:
June 12, 2002
Export Citation:
Assignee:
UBE INDUSTRIES (JP)
CHUGAI PHARMACEUTICAL CO LTD (JP)
MIYATA HIROYUKI (JP)
TAKAMA AKIRA (JP)
YAMAMOTO YASUHITO (JP)
ATAKA KIKUO (JP)
CHUGAI PHARMACEUTICAL CO LTD (JP)
MIYATA HIROYUKI (JP)
TAKAMA AKIRA (JP)
YAMAMOTO YASUHITO (JP)
ATAKA KIKUO (JP)
International Classes:
C07H17/08; (IPC1-7): C07H17/08
Domestic Patent References:
| WO1994010185A1 | 1994-05-11 |
Foreign References:
| EP0846697A1 | 1998-06-10 | |||
| EP0643068A1 | 1995-03-15 |
Other References:
See also references of EP 1408047A4
Attorney, Agent or Firm:
Tsukuni, Hajime (Toranomon 1-chome Minato-ku, Tokyo, JP)
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